Mark IV + mfx - please advice

Hi, I'm the new guy. Joseph from Croatia - Europe.
I bought Mark IV combo but I need extra fx. I am looking for floor eff wich I can run trought fx loop of Boogie or directly in PA system. Delay, chorus and pitch shifter I use a lot.
Line 6 HD300 orTC Nova System. Any experience? Just need modulation eff, drive is from the Boogie.
HD looks better because expression pedal...
Please advise about these eff and what's the best way to connect them with Boogie.
Tnx

Disregard my grammar :roll:

Nova System sounds very good and had a jack for adding an expression pedal should you need one.