You could use the Disco pump to fill a talon,,,,, you would just need to install the air force adaptor onto the pump. I used to have a Disco w/pump,,,,, was a decent pump, worked well.....
As for whether to get the Disco or the talon SS first,,, personal choice on your part.......I have a Talon w/18 inch barrel, .22 caliber that I got about 2 weeks ago,,,, absolutely love the gun !!!!!
If you buy the Disco / pump combo you get a good pcp pump and wind up getting a pcp rifle for around $165 bucks.Certainly a deal, provided of course you get a "good" disco. I returned mine due to "QA" problems, but it seems if you get a "good" one then you will have a fine shooting rifle.
I'm now thinking about buying an SS in .177, that's how much I like the talon...... but I may get another disco one of these days.
Jeff