I installed NomadBSD at my ThinkPad X200 (C2D P8600 4GB Ram 320 HDD 5400 rpm).
I choose ZFS but i fell not good performance and high memory usage.
My use is not profissional, just web browsing, office and light softwares.
Do you recommends a new UFS install?
ZFS takes a lot of ram, but also how it takes it frees it, now well; with UFS there can be improvements and more with only 4 gigs of ram, personally I would, yes.