I have a Delsey Helium that I like a lot, but it isn't the 29" - I believe it's a 25". I like it for long trips because the lid is actually a compartment for clothing (like 1/3 of the volume of the suitcase) and it's really lightweight but doesn't feel saggy when it's packed full.
That said, it's a bag I don't use much and I get the feeling if I used it frequently, it wouldn't hold up. One of the corner bumpers tore off the first time I used it and it took Delsey about 3 months to repair it and send it back. It's a pretty good bag, though.
Travelpro does make great bags.
Funny, I just looked up luggage ratings on Consumer Reports. They only ranked carry-on bags, but Tumi, Victorinox, Hartmann, Briggs & Riley and Travel Pro were all ranked above Delsey (in that order), but Delsey Helium Fusion was the CR Best Buy. All these were recommended picks - nothing else ranked was recommended.