Another potential bidder is balking at proposed deal sweeteners for LSP Energy's proposed stalking-horse bidder, which could get a payment of $7.5 million if it is beat out at auction, Dow Jones DBR Small Cap reported today. In court papers filed on Tuesday, Quantum Utility Generation LLC said that the proposed breakup fee increases the cost of participating in the auction for rival bidders by $9.5 million over previously approved auction rules that didn't require the payment of a breakup fee or an initial $2 million overbid.