Good choice on the TT. If I were to have to replace mine it would be on the short list with a Music Hall 2.2 and another SL series. I was actually surprised when my Technics worked perfect after sitting in a hallway closet for almost 20 years. Took it out dusted it off and hooked it up to the 990. Been going strong for the last 2 years. If I remember the feature list for the 978 and 998, it doesn't have a phono stage built in. At least we are in the right year for the 978. Have you looked at the AV7005? Its gotten rave reviews everywhere I have seen and it has a phono stage.
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Music system
Model 990/7500/Magnepan 1.6 QRs/Technics SL1200 MK2/Aperion S-12 Subwoofer/OWA3/Sony NS75H DVD
APC H15 Power Conditioner

TV System
Large Advent Loudspeakers/ Polk center/Monoprice surrounds/Panasonic Viera 42 inch/Onkyo HT-RC260/Sony BDP S590/Directv


Home Theater System
Onkyo PR-SC886/Outlaw 7125 Klipsch RF-82 L/R,RC-62 center, RB-35 SR/SL, BENQ HT1075, Outlaw LFM1-EX/OPPO BDP-83/Directv
Harmony ONE
Blue Jeans and Monoprice interconnects
APC H15 Power Conditioner