a good upgrade barrel for the 98

Try either the Lapco Bigshot or JJ Ceramic. The bigshot is very accurate and the ceramic is very quiet and has decent accuracy. JJ can be found for $30 and Bigshot for $40-50. It will save you some money.

bigshot awesome acuracy for $50

my dad has a 98c and put a Teardrop barrel it for $20 it has great range and can almost match my freak with the right insert for $150 cheaper!  Its made by Smart Parts so you know its a good quality, if you want to be more pironistic, get the new Tippmann WERKS barrle, no idea on the price as of yet, Ill be getting one for my A5 because I plan to do a similism look too, and want to put a bipod on it so I wont mess up the Freaks porting, but its Tippmann, so its made for your gun, and its got great quality with even better customer service

From personal experience I recommend choosing a bigshot, ceramic, or flatline depending on your needs. If accuracy is most important I suggest the bigshot. If price or sound is most important, I suggest the ceramic. If you want long range and decent accuracy then get a flatline. I use all 3 of these barrels myself and I like them all but each has strengths and weaknesses.

flatline is a wonderful barrel.