First of all, Specter has not been "decent" on judges, he has been pretty bad. He has not lifted one finger to help any conservative judicial nominees, with the sole exception of Justice Thomas, who had the fortune of being nominated a few months before Specter faced Republican primary voters and thus was positioning himself to the right. Don't forget that Specter voted against the judicial nomination of Jeff Sessions, who a few years later became a Republican Senator from Alabama. And as Chairman of the Judiciary Committee, Specter can pretty much block any conservative nominee he see fits, and has "warned" Bush not to nominate "extremists." So had Toomey received that 1% extra he needed to defeat Specter it would have been a huge coup for President Bush's judicial nominees.
And as for your theory that GOP Senate nominees in other states would have been underfinanced had Toomey won the nomination, remember that (i) the NRSCC actually spent quite a bit of money to reelect Specter, first in the primary and then in the general election; and (ii) the NRSCC would have received a hell of a lot more in monetary contributions had it not supported Specter over Toomey in the primary. Toomey would have been able to raise plenty of money without the NRSCC's help, and we would have ended up with the same number of GOP Senators, except with Jon Kyl as Chairman of Judiciary and with a strong conservative in Toomey instead of a RINO in Specter.
Specter has voted for 100% of Bush's judicial nominees. I don't particularly care if he's the champion of them, we can get other people for that. If he votes our way on them, that's good enough for now.
And you'd have to prove to me that they dumped money to Specter, and even if they did, whatever it took, would have taken 10X as much with Toomey, and your assertion that they would have recieved more donations is highly speculative. I can't imagine that there were all these people dying to donate money to Toomey that wouldn't have instead just donated it to Bush or another Senate candidate. I can't imagine a sane conservative being more concerned about winning the Pennsylvania Senate race then keeping Bush in/Kerry out of office.