Why did he say "Bano Banisi"?
Malbim: Hashem already dwelled here when it was Tohu va'Vohu (empty), darkness, cloud, a mountain, field and granary. Now that I built a house for You, I know that it will be Your permanent dwelling.
What is "l'Shivtecha Olamim"?
Rashi: Once [the place of the Mikdash] was chosen, there was no Heter for Bamos, and the Shechinah did not dwell elsewhere.
Radak: Gilgal, Shilo, Nov and Giv'on were not "the place that Hashem will choose" (Devarim 12:5). Rather, it is where the Akeidah was 1 , and Avraham called it "Hashem Yir'eh
Malbim: It is also where Yitzchak went "Lasu'ach ba'Sadeh" (Bereishis 24:63, i.e. to pray), and where Yakov saw the ladder when he left Charan (refer to Bereishis 28:10:3:2), and where the Shechinah appeared to David.
