advice needed on 1st real stereo system

When playing music at moderate levels, only a few watts of power are being used. (at low levels it may be less than a watt!)
the power needs are not a linear function. so the power needs go up very fast with the increase in loudless.
If you never, ever want to play loud.. 65 watts is all you need. If you have any thought to cranking it up, say a party, with a room full of guests, then get the higher powered amp.
As for speaker cables. For a beginner, buying ordinary 18 gauge lamp zip cord is FINE. if you want to splurge, get some cheap zip cord speaker wire at Radio Shack.
After you have had your system for a year or so, then think about trying some wire. By then you will be able to hear if it sounds better, or not. Which is the ONLY reason to buy any. If it does nto sound better, then return it.
For interconnects, plenty of low cost Under $100 a pair interconnects around. I would say use what the dealer can give you free.
Or Mogami.

I agree with Philiojet. If you play rock/jazz/classical like I do and you have the right room for it Audio Note speakers-- AN-E's or J's play all types of music. The E-s like tube amps. 8-20 watts is all you need. Just be sure to hear them first. Seems like folks either love em or don't.

Hello NG1 and welcome. I would try and listen to as many systems as I could before making a decision. If you could get to a show that would be ideal. Systems tend to have characteristics that some like, some don't. You will hear terms like "musical", "analytical", "warm", "bright", etc to describe components and systems.
As far as cables, component isolation, etc. remember that a system can only be as good as it's weakest link. You don't have to spend foolishly but all parts of the system should be addressed. If you stay focused on great music and ht and forget about the bling you should be ok.

I would go with the Nova over the Decca. You are correct that added power helps with dynamics especially with you liking classical music. Also looking at the ohm power ratings of the two the Nova being more powerful comes much closer to doubling its power into 4 ohms. This generally means that the power supply is a little more robust. As far as totems Inhabe not heard them but they generally receive good reviews. I wouldn't bother with cables until all your other componets are a little closer to being topped out. While cables do make a difference it's nothing comparable to upgrading your speakers.

Take a listen to the new 1295 Rogue Sphinx tube hybrid Integrated amp offers flexibility headphone section ,phono ready it is a real nice machine.
You mentioned ( looking for your first real system.)
In a world filled with sizzle, these are the steak Vandersteen 2CE Sig 2
These full range form following function speakers offer in my opinion a far better attempt at reproducing the venue. Both Rogue and Vandersteen are made in USA if that's important to you.
Dealer for both Johnnyr