Kegs - be careful of the cheap manifolds that have flooded the market over the last couple of years. I have seen some horror stories with them.
Some examples:
No or little bracing so pipes keep cracking.
Bolt holes not correctly aligned.
Welding dags in the pipes reducing the flow.
Warped flanges requiring replacement.
None offer flow figures compared to the standard manifold. Just because it's shiny and aftermarket doesn't mean it's better.

If you've got a couple of hundred bucks burning a hole in your pocket buy a Bosch or Walbro fuel pump as this will be a necessity at some stage.

Regards Matty