It's likely just a GAS thing... I'm not in a hurry to burn £1500 on a 4th rig, even if it's typical value is £5000+
The Aguilar rig is fantastic, but you know how things are, if an equally great rig raises it's head, it'd be rude not to deeply consider it!
That Hellborg set up of yours does look like a truly top end rig... I'd be lying if I said I wasn't a shade envious!