Hey CBR community!

I'm planning on buying an omnibus in the following months. I wanted to ask people for advice and their opinions on the ones I'm considering at the moment.

My options are:

Kurt Busiek/George Perez Avengers Volume 1
Collects: AVENGERS (1998) 1-23, 0, 1 ROUGH CUT; IRON MAN (1998) 7; CAPTAIN AMERICA (1998) 8; QUICKSILVER 10; AVENGERS ANNUAL '98, '99; AVENGERS FOREVER 1-12

Uncanny Avengers
Collects: All Uncanny Avengers issues

Fantastic Four by Hickman
Collects: Dark Reign : Fantastic Four 1-5, Dark Reign : The Cabal, Fantastic Four 570-588, FF 1-5

X-Men/Avengers: Onslaught
Collects: Entire Onslaught storyline

I haven't read any of these before so I'm not sure how these runs are. Appreciate any and all input!