Depends what you want to do with it. Not familiar with the bombard but as I said on another thread, the Ribcraft 4.8m is hard to beat sub 5m RIB for more serious use. 4 or 5 of them circumnavigated Britain on the RB4 raid in 2001. The are more utilitarion for sure but I think they are cracking little boats. Ask JCW he kept his even after buying a Ribcraft 585 with Bern Hanreck!
Bombard DB500...I cannot comment as I don't think I have ever seen one.
4.8 ribcraft. Great boat. Well made. Dry ride. Handles wobbly water well. Top marks for build quality and attention to detail. I have been out in bigger boats that have a harder ride and seen more expensive boats with a worse build quality.
2000 euros is a lot of extra money to fork out for a smaller boat BUT...it is quite possible that the Ribcraft may hold a little extra residual value over the years (in my opinion)
I have no experience of the Bombard, however the Ribcraft 4.8 is a great Rib. With a good set up it can be fast, economical and easy to launch / recover. They do seem to retain value and sell quickly second hand.
I would like to support Alan and JCW on this. I accompanied these excellent craft round the UK back in 2001 and was able to appreciaqte them at close hand.
Here is a shot of "Spirit" being Driven by Martin Collins and Mark Featherstone doing 30knots across the Irish Sea.