Also remember that there is a bit of difference between a suit and a jacket. The jacket in a 1 piece suit will most likely be shorter than a normal leather jacket so it may look a bit weird if you use it for commuting purpose. Make sure you go to a store and try them on first. A 1 piece will always be more comfortable compared to a 2 pieces but I would have to say that a 2 piece suit is more practicble. You will also have to take into the consideration of the zipper length between the jackets too. Some offer zipper in the back while others offer zippers which completely zip up your jacket and pant. If you end up getting a 2 piece combo of suit/jacket/pant; I'd highly recommend getting a model with full circumference zippers.
As far as boots, I've not had any luck on infos regarding Oxtar but Sidi are much more popular and the reviews are more accessible. Just remember that riding boots aren't meant to be used to walk on as walking around will eat the sole of your expensive boots quickly. I actually have two pairs of sidi boots, a Sidi Scorpion boot for commuting and walking around school campus and another of sidi riding boot (forgot model) for twisties riding.
As far as boots, I've not had any luck on infos regarding Oxtar but Sidi are much more popular and the reviews are more accessible. Just remember that riding boots aren't meant to be used to walk on as walking around will eat the sole of your expensive boots quickly. I actually have two pairs of sidi boots, a Sidi Scorpion boot for commuting and walking around school campus and another of sidi riding boot (forgot model) for twisties riding.