I've read each and every response several times. I'm floored over the excellent advice you have all offered me and I've really taken it all to heart.
I understand the reasoning behind many of the opinions that I'm not at the stage to be riding an expensive bike because I don't know what I don't know yet. I do know that, in the past three years I've been riding a MTB, FlatBar and folding bike, I love going on rides averaging in the 40-50 mile range on a weekend day. I really have taken to cycling and don't foresee losing interest. I tend to keep with a hobby sport. I've been a semi-serious runner since I was 15yo until about 5 years ago when I decided I had to break from the activity due to my knees. I took up golfing ten years ago as a break from the monotony of grad school and it stuck. I still enjoy getting out and playing. In fact, my adoption of that sport parallels my current situation. When I first started learning golf, I had to get a set of clubs. I've always been someone who only buys something after somewhat intense consideration of options and then staying with what I have. (Cars especially.) At the time I picked up golf, I thought about buying a cheap starter type set like AMF to get me going. Without boring you with the details, I decided to buy some nice Callaway VFTs of which at the time I was unworthy at my level (complete beginner). I'll spare you from my decision-making justifications. Point is, I still play with these clubs; have never considered upgrading. Still love the feel of my clubs because neither time nor technology has changed the fact that they are quality clubs. Yeah, I've changed my swing slightly as I've developed as a golfer, but the clubs are forgiving enough that I'm happy with them 10 years later.
Another example is piano. I learned to play starting at around age 11 or so. To this day, I play the same piano my mom could afford when I was a kid (it's not a great piano) but it's still pretty good and good enough that I wouldn't upgrade --- hey, I'm never becoming a concert pianist and I'm fine with that realization. It's all about enjoying your hobbies.
However, from everyone's advice on this forum, my understanding is that with cycling, it might not be the case that quality equals good choice because we change a lot more as cyclists than as golfers let's say. Unless there is someone on this forum who is also a long-time golfer (if so, perhaps she can speak to an analogous evolution in terms of athlete and equipment), I don't think I can apply my general philosophy - that of trying to buy the best my budget allows at the start and then growing into the quality of the equipment as the caliber of my skills improve - to cycling. This is very good to know. Cycling does seem quite unique in this respect. For most other hobbies in my life to which I can apply my experience, I've had positive reinforcement in obtaining the highest quality I could get at the start so that I could grow into it. Not so, maybe, for cycling as we evolve as cyclists.
This is a valuable understanding to arrive at through everyone's comments and advice. Thanks again to everyone who took their precious time out of their days to read, consider and offer thoughtful advice to this newbie. Perhaps someday I'll see one of you out there on the road (mostly likely the back of your head) -
Thanks again.