I agree with Antag's opening comments. There seems to be an "all new Gibsons are cr@p" bandwagon rolling at the moment, and gathering momentum. Unfortunately people who've never even played a Gibson start reading these claims and repeating them to all and sundry.
New Gibsons are NOT CRÄP (shocker!). In fact in many ways they're better than they were 10 or so years ago. Timber quality has improved, so it's less likely you'll see the bone-dry, pale fingerboards that were all too common in the 90s (unfortunately they seem to be using up the old shitee on the Faded SGs and Vs, but even then there are good ones). My Pete Townshend SG even has a one-piece body, which I thought I'd never see again on anything other than Hamer or PRS.
However, new Gibsons are VERY INCONSISTENT. There seems to still be quite a lot of hand-finishing at the Gibson factory. I have two '99 SGs and the sanding on the body contours is quite different. Also the finishing is a bit rough and ready - the nitro finish always sinks into the grain somewhere, especially on the sides of the headstock. Personally I like these "defects" - it feels like I have a guitar built by humans.
I agree with Antag about the fretting and fingerboards - they still seem to install the frets pretty heavy-handedly, so there's sometimes a lot of pitting/minor splintering of the board around the frets. Touch wood, this hasn't affected the playability of my own guitars (or maybe I'm just easily pleased).
The main reason I continue to buy Gibsons is the necks - LPs or SGs, those fat rounded neck profiles are just perfect for me. I've owned Hamers whick knocked the Gibsons out of the park in workmanship terms, but I've always ended up keeping the Gibbos for those necks. Of course that's a personal taste thing...
Again, as Antag said, shop around. I'd buy a Japanese or Korean guitar mail order, but you need to try Gibsons to make sure you get a good one.
As for where to buy, Chandlers and Vintage & Rare are fine, but their prices are stratospheric. If you decide to buy new, I'd recommend travelling a bit - try Peter Cooks in Hanwell, Coda in Luton or Stevenage and Guitar Village in Farnham. The shops may be small and pokey, but they have big stocks on site and the prices are much cheaper.