For what it's worth:
I've always been a "bosh man". I don't know if they are the best, and makita seem to have a bigger share of the woodwork/building industry but in metal work it's probably neck and neck. I'm a mechanic by trade and I don't like treating my tools with kid gloves. When the work is on I bog in. I've got a green angle grinder and it's ok. I've got a blue drill and it's unkillable. The chuck is just about dead but the rest of it is going fine. It'll be getting a new chuck in due course. There is a very big difference between the green and blue ranges and probably more so now. They seem to have pushed the green down market to compete and the new stuff looks pretty poor to my eye.
I've always been suspicious of complex tools. I worry there is more to go wrong on the job. I know a lot of people who swear by makita. My only makita is a planer and it's very good. Some of their grinders sit in the hand well. So for what it's worth I think those two ranges, bosh blue and makita, are good safe bets. You'll see an awful lot of tradies in all specialities using those two and much less of everything else.
If you want cheap well I've had acceptable service from a range of stuff, ozito, gmc, xu1, supercheap stuff...it's not the same as real tools but if it's a one off or whatever you can get service out of any of it.
I think a bosh blue saw is a good investment. Probably a life long tool.
I'm just a startled bunny in the headlights of life. L.J. Young.
We live in a free country. We have freedom of choice. You can choose to agree with me, or you can choose to be wrong. Me.