Service Pack recommendations for SBS 6.5

What's the going wisdom concerning service packs and SBS 6.5?
I see that there is an SP8 for Netware 6.5 servers, plus a hot-fix or
two. I assume this will be the last service pack issued for "pure"
Netware servers - is this playing well on servers or should I stay at
SP7?

When I visit the Novell Downloads website, they only show SP4 when I
look at SBS servers, but the SP7 seems to be running OK on the ones
I've done so far.

What is the recommendation vis-a-vis service pack levels for SBS 6.5
servers running Netware? ( so they're running Groupwise, Virtual
Office, iManager, iPrint, NetStorage, etc.)

Warren