My IM100-EXT. The height of only ~18” but the footprint is ~48X24 so lots of room to aquascape. Looking forward to building it but so far, it hasn’t seen water yet.
If the limit is under 150 I'm not sure if they make a 149 but I'd pick that one.
I have the traditional 125 and I wish I would've gone bigger. Although it seems like once you go over 4ft long everything starts getting considerably more expensive.