I haven't used these, but the weber Q series look like some high quality rigs. The Q100 series is 189 sq in & 8,500 btu..about the right size for 2 people for an entire meal. The Q200 is 280 sq in & 12,000 btu...(a touch bigger than a weber 18.5" kettle @ 240 sq in)...it would handle 3 persons for and entire meal, possibly 4. I've grilled chops/chicken for 6-8 on my 18.5 kettle, no prob. When I say entire meal, I'm refering to skewered taters/veggies and 3/4lb of meat per person...fyi.
I wouldn't recommend the "go anywhere" grill...it's just a thin sheet-metal box style grill and lid, designed to be light-weight, and that includes the cooking grate.
Other brands I've seen don't compare to the weber Q series at all. You will pay for the quality of the weber, but if money's not an issue, the choice is easy...I'd not hesitate to go with the weber.
Eic