£450 sounds high, but maybe these things are cheaper over here. One advantage beyond rating to a bigger press is the ability to press bigger pieces. I'm not sure I would have been able to press bearings off/on the gearbox shaft, for example, with a smaller 10t. Bottom line, check the length capacity on whatever you're looking at and confirm it will work for the longest item you may want to work on.
Here is a picture of my 20t. It is a bottle jack design, which I like because the bottle jack can be easily replaced.
Take care that under the extreme pressure these things generate that slippage can result in heavy parts flying at high speeds, and come up with some form of protection. I hung some heavy woven steel fireplace curtain in front and back. It won't stop a 20 pound object ejected under force, but my hope is the added mass might slow an errant part down enough to prevent major injury.
You'll want and need some other tools along with it - most helpful is a bearing press set with a variety of diameters, as below. I can usually find a piece of pipe or pipe fitting to use as the larger "receiving" bit. Last, realize some press designs make working on certain parts difficult, if not impossible. The design of mine, for example, doesn't work for pressing bushes out of the rear wishbones without risking damage to the wishbones, but fortunately there are simpler ways to do that. If you have access to a mill and lathe you can, obviously, make things to custom fit.
Good luck!