Andy,
I just recently purchased a 7410 and have the following comments:
First, the pump actually wasn't as big as I thought it would be. The pump unit itself is bigger than a maxijet 1200 (my guess is 50% bigger) but when you look at the output it is quite reasonably sized. The strainer makes the unit long but it seems like it will get covered with coraline real quick.
Second, you need to think about how you are going to mount it. It comes with, IMHO, not enough hardware to mount the thing properly. I don't know how you are going to use it, but the odds are you will have to DIY a mounting bracket or order more hardware. Either one of these options suck considering that you just spent $250 on a powerhead.
Overall I am happy with the pump. I am frustrated with the mounting options and getting nickel and dimed on the hardware. Why sell a pump for $250 and charge $7 for a suction cup bracket. Look at all the accessories that come with $20 powerheads (Maxijet and even Rio).
Let me know if you need any further information.