Should I trade my RS 5001's?

(Sorry to be reposting this from the "Speakers" thread, but I'm specifically looking for some Infinity owner insight.)

I have a chance to trade my RS 5001 3-way floorstanders for a pair of slightly larger Dahlquist M909s. Both pairs are in good condition.

DAHLQUIST M909
3-way (4 Vifa drivers) flocked anti-diffraction baffle, 100wpc (?)
30 Hz - 24 kHz (?), 8 ohms, 92 SPL
Crossover freqs: 125, 400, 3,500 Hz
Manufacture Years: 1987 - 1990
MSRP: $1,500/pair

INFINITY RS 5001
3-way, EMIT k tweeter, 125wpc
42 Hz - 45 kHz, 6 ohms
Crossover: 600, 4,200 Hz
Manufacture years: 1989-1991
MSRP: $738/pair

They are asking $200 for the Dahlquists, which is about what I paid for the Infinitys six months ago. So they said they'd likely do a straight-up trade.

Would you pull the trigger? The RS 5001's have been quite nice, but just thinking about trying something new (old) without much risk/cost...

is it a step over or up...?

don't know anything about the Dahlquists...

A major coup if a trade ensued.

I'd do it! The Dahlquists I've heard (never heard a 909) sound better than any of the RS X001 series I've heard.