Amiga 2000

Well after not much luck getting the older OS stable I decided pos to look at going for a newer kickstart OS installation and Brought OS 3.5 with the next step to buy the Kickstart Roms.But found out that the Fusion Forty would need New roms as well. Which I dont know how easy they would be to get and at what cost.Then would I have problems with ICDSCSI 2080 with Kickstart 3.1.
So am I wrong in thinking Workbench 2 will not install onto a A2000 with Kickstart 2.0 (37.175) roms and I need to look at installing either Workbench 1.3 on currant setup or see if I can find a Kickstart 2.05 Rom and then try installing Workbench 2+.
Trying to locate a Full workbench set.But which version do you suggest I should be installing on A2000 with Kickstart 2.0 37.175.
Was thinking if I can get Kickstart 2.X installed and then poss use SKICK to run KIckstart 3.1 to see if Fusion forty and ADSCSI 2080 would work.If they do would then buy 3.1 kickstart chips and then installing OS 3.5 .
But first need to walk before I run so would like a stable OS installation on current setup.