I went the other way – started out in N because I knew I didn’t have much space and logic told me that N would mean longer trains and more interesting layouts. But I have (happily) now switched to HO. I think we try to make N vs. HO a logical decision, when there is a large emotional or non-rational part that must be considered, too. Like jnichols said – if space is your biggest concern, go N scale. But space may not be your BIGGEST concern.
The “emotional” part of this decision I’m talking about refers to what makes the hobby satisfying for you. For me, I kept finding that I would go to the hobby shop when I was in N, and gaze longingly at the HO rolling stock… loved the look, the heft, the detail, the wide selection… while always feeling that N stuff was just too tiny to offer the same pleasing “feeling” to me. Nice long trains, yes… but that always felt like itty-bitty toys.
So, like you, I reached a crossroads (or is that a grade crossing?). In my case, I decided to go DCC. Should I install decoders in my N locos, or start fresh? Bit the bullet. I sold all the N stuff on ebay and made the switch to HO. I miss the space, the train length, and the lower cost of rolling stock in N. But I love working with those HUGE (after being used to N) turnouts and rail joiners. I love the much wider availability of things like structures, signals, accessories, etc. But mostly, for me, it just feels better. I just so thoroughly enjoy looking at, working with, designing, creating trains, running trains (playing with) with those big beautiful HO cars and locos.
I say go to the hobby shop, really look at, hold, and study engines and cars in both scales… especially N since you’re used to HO. Imagine building the layout with each. Examine track and rail joiners in both scales – one in each hand – and think about the hours you’ll spend with it. And listen for which one “speaks” to you.
My wife says she liked the N scale layout better. “Cuter” she says. Ye