How big an area are you going to be dealing with?
I own a landscaping company and this time of year that's all we do is suck up leaves and have tried many different ways of do it.
That type bager your suggesting using would be the last one I'd pick.
Even using it on a regular mower that it was intended for is a PIA.
The hose stays plugged up, it does not chop up the leaves so you'll spend as much time emptying it as trying to suck up leaves.
If the grass is to high, if there at all wet you may as well stay in the house.
Plus unchopped up leaves take far longer to decompose to make compost.
That comment by ZTMAN is also very valid, even my Ferris that weighs about 200 lb. more then yours does would do a wheely when I used to have a bagger mounted to the back of it.
I had to mount a 50 Lb. weight to the front of it to keep from flipping over.
A Z turn has all the weigh on the back of it unlike a regular lawn mower.
I tried 3 different styles and three different brands of lawn vac's and the one that's worked best for me and it gets used sometimes 6 hours a day is the Trac Vac 580.
It's not cheap to buy and may be more then you need if you have a small yard. AGRA-FAB also sells a cheaper model that works the same way, but uses way to many plastic parts for me.
That cheap plastic chute would not last a day with what I'm doing.