OEM dump valves are absolutely fine, you're just better off buying a new one suited to your application rather than a random knackered one - especially as they're fairly cheap. They only have a bad reputation because so many modifiers buy tired secondhand OEM ones designed for 7psi of boost, and expect it them to last 10,000 miles of 21psi abuse. Nothing wrong with Forge valves either, but why pay silly prices for new shiny bits when more thoroughly tested designs can be had cheaper. The Bosch valve on my Saab is the original one, and although it works still it's a little tired now - but then it's done 180,000 miles so I'm not surprised!
The pipework's not an issue to sort out at all. My first attempt was reasonable, but I re-did it all when I switched to a GT throttle body and Emerald. Am now using an off-the-shelf t-piece and a scrapyard boost hose so I've got a recirc installed very neatly and out the way very close to the compressor.