robzilla - 10:13 am on Sep 29, 2013 (gmt 0)
I don't think the extra 10GB above the 6GB will do much for you, since it's a fairly small shop. SSD storage is probably going to make a bigger difference, especially on disk writes, but it depends on the platform (an array of good HDDs can still outperform SSDs). Perhaps you can ask for a trial account and benchmark the two?
Don't underestimate the importance of CPU either; especially on shared platforms this can be a problem -- another reason to go with a dedicated server or VPS.