suricatasuricata
Contributor
My instructor also said not to get the xdeep backplate because of the non-standard crotch attachment points on the backplate (it's a Y shape).
To be clear, this isn't a universal GUE restriction. I've seen a local instructor be fine with the Y-shaped crotch strap. However, instructors can have specific preferences, which is why this conversation is best had with the instructor of your choice.
Like you, I was averse to paying the Halcyon tax at first. While I'm not exactly budget-constrained, I am conscious in getting the most value for everything I purchase. I ended up buying a Halcyon backplate as their edges are truly rounded and smooth. It may seem like a small detail but I rather not take the chance in subjecting my hoses, webbing, and drysuit sleeves to undue wear-and-tear if it can be avoided.
I have a Halcyon Steel backplate, it is almost identical to my cheapo HOG backplate that I bought before that plate. This isn't to say one is good or the other is better. Just offering additional choices.
This is again one of those cases where your instructor might have a preference that is different. I use a cheap steak knife with the edge broken off and smoothened with a dremel. A tool with a sharp corner (as is apparent in the product page of the titanium multi-tool) would be heavily discouraged by my local instructor.One last plug for Halcyon is their titanium multi-tool (you'll need a cutting device per GUE standards). This tool is a brilliant all-in-one. Both smooth and serated knife edge, indent for line-cutting, two different sized wrench heads for regulator hoses, and three stacked allen keys for regulator plugs etc.