Hi mate,
I have an Elephant Racing brace but it is yet to go on, it has the monoball top mounts and then the brace affixes to those using collars either end, so front will be a lot stiffer when I eventually get my butt into gear on it. I bought it second (or third) hand so it was a lot cheaper than the new price.
When I was at Husborne last year there was a guy sellling the Weltmeister braces for £120, wouldn't go any less so I left it, but they are recognised as pretty good as they bolt onto the shell; you want to steer clear of the ones that sit on the tops of the shocks, proper handbrake-in-a-canoe stuff. I like Sparco gear, OMP also pretty good, though IMO you want to keep away from cast ally, go for billet or fabricated parts. What does the Sparco one look like? How does it fit to the car?
Have you tried a search on Pelican to see what the guys there recommend? That would be my first port of call in your shoes.