Renogy hands down. You can get their 100w panels for ~$100 if you make an offer on them. Thats what I paid for my first two. Then I bought 4 more from Mighty Max solar (on ebay as well).. $194 for 2 - 100w panels. All 6 panels look identical and it wouldn't surprise me a bit if they came out of the same factory.
I bought 6 panels and was going to use them for a home project... then got a bus and decided to use them on it instead.