I've had a uwave /convection oven. I found it awkward. Quicker, yes, but seemed to overcook the surface of stuff (which makes sense since uwaves penetrate about a cm or so and the innards of a dish have to heat by conduction from the surface).
I'd get a Cuisinart Steam Oven. Not quite as fast a uwave, but fast and with clear advantages re cooking quality. There's lots of stuff I'd never use a uwave for...but nothing that I wouldn't put in the CSO
I have both and rarely use the uwave. Maybe to thaw a pizza slice before I put in in the CSO.