For whatever its worth, earlier in the year I was considering a dedicated, and per a developer of vBulletin (that's the message board which drives my site and brings my traffic)... "the way the Raq's are built, they are terrible in terms of serving dynamic content, especially where any sort of sql-based app is involved."

At that time I ended up going with a high bandwidth shared server with olm.net. The site has outgrown that now and I am leary of a RAQ based on that vBulletin developer's comments.