Best Value 700 x 23 tyres

Another vote for Vittoria but
Another vote for Vittoria but the cheap Rubinos, non folding of course but the Kevlar/Aramid breaker strip does indeed work. http://www.chainreactioncycles.com/vittoria-rubino-road-bike-tyre/rp-prod31768

I would not touch Spesh kevlar folders with a barge pole as I had a rather pricey pair of them not just puncture but explode, they seem to suffer from the problem that when they do get a puncture and the glass or thorn is still in there plugging the leak the escaping air from the tube gets between the layers of rubber and kevlar that form the shoulders of the tyre which creates a big air filled blister. Then they go bang leaving a inch and a half patch of de laminated tyre tread. Fortunately it did not happen at speed.

I would recommend you look at
I would recommend you look at Specialized Espoir Elites.

Available in 23c (260g) and 25c (270g) at £25 a each from any Specialized dealer (eg Evans).

I run them on both my winter and summer bikes and despite regularly picking embedded flints and glass out of the tread, zero punctures in two years. Originally recommended to me by the local semi pro team who use them as their training tyres.

I’m currently riding Vittoria
I’m currently riding Vittoria Zaffiro tyres – they came with the bike. So far I have no complaints (or punctures). I’m sure there are plenty better tyres out there, faster rolling, more comfortable, better puncture protection, harder wearing etc but at the current price of £7.50 from Wiggle you certainly get good value for money.

It all depends on your definition of value for money I guess. Some people may see £20 as good value for a tyre, I would say that’s my upper price limit.

Have read too many negative
Have read too many negative comments about Gators so would avoid.

For value you would be hard pushed to beat Schwalbe Blizzard Sports. A supple 240g tyre with good grip, >3,000 miles, under £10 each. Only downside: token puncture-resistant layer (this seems important to the OP), though I had 1 puncture in that time and I ride a lot on crappy lanes with hedge cuttings and so on.

The kevlar version might be good. I was going to buy those but Spa Cycles have 700×25 rigid Durano at £15 each so I bought them instead. The Durano is considered one of the best training/all-rounder tyres you can buy (see http://road.cc/58178). About 500 miles so far and I’m happy.

All at http://spacycles.co.uk/products.php?plid=m2b0s121p0

I use the Pave 24s (tubs) on
I use the Pave 24s (tubs) on winter bike. lovely. No punctures this winter. I think there is a lot of benefit in having high thread count and the latex inners – both tend to deform around pointy things a bit more before being penetrated. (fnarr fnarr). I’ve found sharp granite chips stuck in the rubber, but they dont seem to get through. I bought them for £35/ea from PlanetX, which was half RRP, but I consider them good VFM. I’ve done about 2500km on them so far, and the front seems barely off new, and the rear very slightly worn. Theres a lot more life left in them yet! Grip’s great and roll well. Feel so comfortable. Whats not to like?

Recently got Michelin Pro4
Recently got Michelin Pro4 Service Course (25’s) at Planet X at £17 each.
Punctures are a matter of luck. My new Gatorskin punctured within 2 weeks of fitting it. Don’t blame the tyre, just a matter of good/bad luck.

Vittoria Rubino Pro Tech for
Vittoria Rubino Pro Tech for me: 8000km and only two punctures last year. Lots of those kms were on London streets which are definitely not paved with gold. I have 23, 25, and 28 on my different bikes. All handle nicely and don’t wear out quickly.