Do you like the feel of a single, double, triple, quad???
Me, I like twins.. I've had 2 BMW triples and one BMW four cylinder.. They weren't my cup of tea.. Nothing wrong with them, but I like the power delivery and feel of a twin, either airhead or oilhead..
Just like Luni said, you can't really go wrong, and there's no incorrect choice.. It's just comes down to what you like..
I rode with Bill when he picked up his K1200RS, many moons ago.. I rode it across part of Iowa, as he rode my R1100R.. I think he couldn't wait to get off my Roadster, and I know I couldn't wait to get back on my bike.. Nothing wrong with the feel of his RS, but it wasn't the bike for me..
Good luck!! If you get a chance, ride several and get the feel for them..