Jasper's is my LHBS. While I don't get kits from them, they do have a nice selection of Wyeast as well as Lalvin on hand. Haven't needed to check out their hops selection due to my own supply being in solid shape.
I know that they use gas to push their LME out of barrels (not sure if it's CO2 or nitrogen) which they have to change out at least twice a week (they push a lot of it).
Jeff, the owner, is a really good guy too. He's been home brewing for more than a few years (20+ I believe). He also makes wine and has good advice on going about that too. I'm looking to get a wine ingredients kit/box from him shortly. He's got the good ones (from what I've read to look for).
IMO, if you're anywhere near Nashua, NH, it's really worth going in to check it out. Parking isn't the best, but that's not his fault. He's also more than willing to special order things for customers. Especially if you're willing to wait until he places his next order with the distributors (saves on shipping for everyone). I usually don't need things that fast, so I've not had any issues with him there.
Only thing I can ding him on is the web site doesn't list what he has in the store for things other than the ingredient kits. I feel that if it did, he'd do even more business.