Over the last 15 years or so I've used three different enlargers
The first was a Durst M690 which I got for free. Generally it was a very sturdy affair except the mechanism which raised or lowered the column, which involved an incongruous plastic cog. The cog wasn't strong enough and I resorted to clamping the column at a fixed height.
That was replaced by an Omega Cromega 6700 - again obtained for free. Apart from only handling up to 6*7 negs rather than the 6*9 of the Durst, that was fine.
Later I got into 4x5 so wanted an enlarger that could print 4x5 negatives. Many seemed out of my budget but I found one on eBay for £550 and drove 100 miles to collect it. This is a Durst L1200. The enlarger came with lots of different condensers, negative holders, and lenses. I was able to recover some of my outlay by selling some of these parts and just keeping a subset that I really need.
Although all three of these enlargers came with colour heads, I don't use the inbuilt colour filtration even for multigrade papers; I use below the lens Ilford filters. The reason is thAt for split grade printing - where you typically use one exposure at grade zero and one exposure at grade 5 - I can't see a way to change the built in filtration without having a light source to read the dials, which would fog the paper.
I wouldn't worry too much about the make and model, just make sure all the parts are there and that the enlarger can be collected within a reasonable distance