A resounding and enthusiastic YES!!! for Barton Goliath in the red-and-blues. Also fully in for The Crossing costume. Beyond that, I'm honestly good with the Hawkeyes I've got already.
EDIT: On further consideration, I'll take the WCA #1 Hawkeye as well. He'd look good with the rest of his team on the shelf.
Big-time yes to Clint Barton in his Goliath persona images # 1-3. Like the character, so I would pick up the #100 costume, WCA, Thunderbolts, "Crossing" or trading card looks.
Clint as Goliath (preferably image 3) is pretty essential for a classic Avengers display. The skirt and deep V from Avengers 100 is one of the most atrocious redesigns in comic history but I would absolutely take a figure of it. I'd also like the WCA limited series costume.
Those are probably the only ones I really need but I wouldn't necessarily say no to any of the other versions. Hawkeye's just such a fun character.
Yes, I would welcome a Barton Goliath figure for my collection. I am good with the Hawkeye figures I have and am not desperate for some of the shorter lived looks for that identity .