I had a similar experience. Owned a SSI and liked it (but not really enough to keep..too modern sounding for most of my work) and later got a SSI fiver. Really didn't get on with it - always sounded a bit feeble, and felt oversized. Moved it on after a few weeks.
The SSII seems to be my Warwick..lovely woods, great design, but probably still too modern sounding for me!