If the piggy backs your referring to are integy, then I'd definitly suggest against them. Leaky, easy to bend, soft alloy that strips out and pops apart. They look nice though, but not durable by any means.
There was a company that made some killer piggy backs back in the day, progressive racing or something like that. Expensive, but pretty much the best you could buy. Hard to find anymore.
Stick with the big bores. They will be money well spent.