which bat preamp pairs better with bat vk55 power

staring to move from my BAT vk300x to PRE-POWER and would really appreciate some advise on which of the above combination is better.

aware that the 2 preamps are of different price category but have read that the vk3ix is sweeter ect...and not exactly CAN/SHOULD be compared to vk32se. In short they are different class hence wondering if it makes sense comparing. Further, the bat vk55 is the max i can afford now hence wld decide on that as a fixed option as power amp.

Definitely would appreciate the ideas of tube swapping in the preamps and aware that 32se despite presence of 6H30, allows for swapping as well (without change of any circuit board...or am i mistaken)

My CDP is MARANTZ CD15 and SPEAKERS are Vandersteen 2CEsig2

any comparision is appreciated. : )

and yes, the 32se/55 pairing cost 3000usd MORE than the 3ix/55 pairing ....is this increase worth it?