I wasn't sure if I'd get much use of a 5er, so I got a cheap Peavey Millennium 5 to see whether I took to it. I since bought an NS CR5M & an Epiphone Thunderbird pro-V and sold the peavey. Had I not got on with the extra string I'd have only spent a small amount of money (which I got back when I sold the Peavey), but had I bought a custom 5er and not got on with it, I'd have made a fair old loss.
So I'd say why not get a cheap (but decent) 5er such as a Peavey Millennium - secondhand if possible so you'll be able to get what you paid for it back, & see whether you get on with it before spending big bucks.