I posted the same thread a few weeks back in food and nutrition I think, there was a few recommendations in there. We ended up getting the fisher price rainforest one as it had all the functions we wanted. I found the best thing to do was go and look at a load to compare and see what will suit your needs and how much space you have!
I have the Iowa one too and it's brilliant. I never bothered buying the tray as its prefect table height. It comes apart super easy too so if we're visiting family it's really easy to take with us. £14 VERY well spent!
Is it this one?
http://www.johnlewis.com/81272/Product.aspx
This is the ikea one, its fab for BLW and you can just pop it in the shower and hose it down.
http://www.ikea.com/gb/en/catalog/products/00069725/
and the tray
http://www.ikea.com/gb/en/catalog/products/40076093/