I went down this road a few months ago. In the end I gulped, took a deep breath, and laid out a month's mortgage on a Beard 20x16 4 blade.

It's absolutely wonderful in use, especially on big prints, and I don't regret it... ...but it *is* close after an unproductive session beating my head against the enlarger!

Recently I saw an ex-demo Beard 16x12 4 blade going for about 100 from Calumet... They're pretty much indestructable so, if you see one going secondhand and can view it prior to purchase, go for it.

I hope whatever you go with gives you many years (decades!) of pleasure!

All the best,