I don't have any experience with this brand and from looking online it looks like it is a more recent brand. My suggestion is that you select a brand first based on a product that fits your needs well and secondly on the basis of support and spare parts.
You comment that this brand is more expensive than Land Pride, in my experience Land Pride is not cheap either. You really have to make sure you are comparing a similar level of product as many manufacturers have several levels or grade of product.
There are many long term brands that have been in the market a long time, Brush Hog, Woods, Land Pride, King Kuttner ....Part's are easily available for these models.
It looks like you have a L2501 Tractor, I assume you are looking for a 5' or 60 inch cutter. Make sure that you tractor has enough horse power to match the recommended minimum from the manufacturer. Based on your 19 PTO HP you are likely to use a lighter / medium cutters than many heavy duty units that recommend 25+ HP for their heavier 5' units. Many manufacturers do not specify a minimum HP, I believe what you are cutting and the speed of cutting are the factors really related to HP.
You should also look at guards or chains for the front or rear, are they standard or extra. Do you need them in the area you plan to use the cutter. Another consideration is slip clutch or shear pin. Slip clutches require maintenance, shear pins are simple and cheap. Every replacement of a shear pin is a teachable moment! I would opt for shear pin unless you are a full time user of a rotary cutter. Floating top link is a nice feature for uneven ground.
When it comes to cost you have some options to new. Shop around, consider a good quality used unit on Craigslist if you can find one. New is nice but after a couple of years use they are all used. All cutters will have a gearbox that is well overrated for your tractor (typically 45 HP gearbox), there is little to go wrong, the biggest issue will be the wear and tear you put on the unit and if you clean and service it. By wear and tear I mean mowing rocks, roots, stumps and similar (yes it does happen to the best of us, a nice low grade shear bolt will save you and your equipment).
I have several Woods rotary cutters, I purchased a BBX60 new last year and love this unit, I run it on a L3200. I have a bigger version of this Woods unit for my MX5800 for use on more open ground. I like the fact that I can get any parts from many sources.
The right cutter will last you a very long time with a little care. Good luck on your selection.