Hi. I own an older Ampeg SVT-III head which is great for rock, but (IMO) too midrangey and growly for jazz, funk, etc. So I'm looking to buy an alternate head (or possibly a preamp) which has a more transparent, "pure" tone. (BTW, I'm playing thru a Bag End 1-15 cab with no tweeter, if this affects the answers.) I have 2 offers, both on used, newish heads: an SWR Bass 350 for $400, or an Eden WT-300 for $450. Your advice?