K-dog, I recently upgraded from $10 to $50 quality, and am really satisfied that was money well spent. There are literally hundreds of choices - this company carries most of the good stuff - 371 listings.
http://www.all-spec.com/search
I started by Googling "best flush cutters" and ended up choosing made in USA Swanstrom.
There are several types of flush cutters - super flush, flush, bevel flush, shear, among them. I started with super flush which cuts the flattest at surface level, but that left an annoying indented flat front on curved heads, like a GI buzz cut - best use would be for flat face trims like wobble jigs. So, I also got a bevel flush cutter which doesn't cut as deep a dent for slightly curved surfaces. There might be a curved cut tool available, but I haven't really looked for one. If you find one I'm interested!
The advantage of pricier cutters is steel hardness - cheap cutters softer edges will fold when they clash together. Haven't tried a shear cutter which might avoid this problem. Swanstrom uses a high carbon chrome steel alloy which is noticeably harder and seems to hold a sharper edge than the cheap stuff, and some of their cutters have a handle screw stop to eliminate blade clash. Google reviews tend to favor other Euro mfg brands like Lindstrom and Erem, but I'm satisfied with my USA Swanstroms.
Tried a used cutter on eBay, but an "excellent" Swanstrom I received had significant edge folding and nicks. Was able to hone off the folds, but the nicks remain. Some buyers rave about theirs being "like new" - luck of the draw.
Be advised tho that my main use for flush cutters is not for trimming off sprues since Do-it RHs break cleanly, but mostly for shaving the break scars smooth. As far as I know there is no tool that can cleanly trim off an oversize RH sprue without leaving a proportional oversize flat cut face.