Personally I've stuck with my commodore 64, yeah sure it takes a while to load, sometimes crashes but nothing more satisfying than playing cassette roulette.
James Pond is still an awesome game
Being an accountant with several years worth of using Sage I'd say possibly look at something else.
It's NOT the MOST user friendly - although it will do everything you need. I think the enterprise versions are trillions of pounds and might be a bit of overkill.
Most of them will provide demo versions - so try downloading a couple and having a little browse around.
Quick books comes quite highly rated.
Also something like Kashflow (all online) is pretty good (and fairly user friendly too).
Just remember once you start using one it will be difficult to change once you're in bed with them as it were as migrating across to something else will be a pain in the bottom.
Goodluck